How to Choose the Mullite Insulation Brick Suitable for Your Kiln?

Lightweight mullite insulation brick is an important refractory material, which is extremely popular in various high-temperature industrial applications due to its excellent thermal insulation performance and lightweight characteristics. Rongsheng Refractory Material Factory provides various JM models of mullite insulation bricks. Contact Rongsheng for a free quote.

JM Mullite Insulation Brick

• JM23, alumina content (%) 45-65, use temperature (°C) about 1350, suitable for general fire resistance requirements.

• JM26, alumina content (%) slightly higher than JM23, use temperature (°C) about 1450, suitable for higher temperature environment.

• GM28 / JM28, alumina content (%) medium level, use temperature (°C) about 1550, suitable for occasions requiring better fire resistance.

• GM30 / JM30, alumina content (%) close to or equal to 30, use temperature (°C) about 1550 and above. Suitable for the most demanding high temperature environment, can be directly exposed to flames.

Rongsheng Mullite Bricks Manufacturer

Common features of mullite insulation bricks

1. Lightweight: Lightweight mullite insulation bricks are lightweight due to their porous structure.

2. Low thermal conductivity: means they can effectively reduce heat loss and have good thermal insulation effect.

3. Energy saving: Due to low thermal conductivity, fuel consumption can be reduced and energy efficiency can be improved.

4. High temperature resistance: Able to work stably for a long time in high temperature environment.

5. Size: The regular size is usually 230 x 114 x 65mm, but there may be other customized sizes.

6. Processability: Easy to cut and install, convenient for on-site construction.

Guide to Selecting JM Mullite Insulation Bricks

When selecting lightweight mullite insulation bricks, the specific model should be determined based on the required refractory temperature, use environment, and other performance requirements. For example:

• For high-temperature equipment that needs to be in direct contact with flames, you can choose a model with higher temperature resistance, such as GM30/JM30.

• For general refractory needs, you can choose a more economical model, such as JM23.

Lightweight mullite insulation bricks have a wide range of applicability in high-temperature industrial applications due to their excellent thermal insulation performance and lightweight characteristics. Choosing the right model can not only ensure the stable operation of the equipment, but also improve energy utilization efficiency and reduce costs.

Introduction to the types and characteristics of mullite refractory bricks

Mullite refractory bricks are made of artificially synthesized mullite, with organic composite fillers added according to the required specific gravity of the product, vacuum extruded and sintered at high temperature to form lightweight mullite products. With its light weight and excellent thermal insulation performance, mullite lightweight refractory bricks are widely used in hot surface refractory linings or insulation layers of various thermal equipment, creating conditions for improving the energy utilization rate of equipment.

Mullite lightweight refractory bricks are high-alumina refractory materials with mullite as the main crystal phase, and the general alumina content is between 65%-75%. The refractory temperature of mullite lightweight refractory bricks can reach above 1790℃. The load softening starting temperature is 1600-1700℃. Good thermal shock resistance.

Features of mullite lightweight refractory bricks

1. Low thermal conductivity, with good thermal insulation effect.

2. Low heat melting, due to low thermal conductivity, mullite series lightweight insulation bricks accumulate very little heat energy, and the energy saving effect is obvious in intermittent operation.

3. Low impurity content has very low iron box alkali metal and other oxide content, so the refractoriness is high. The higher aluminum content enables it to maintain good performance under reducing atmosphere.

4. High hot compressive strength.

5. Precise appearance size, speed up masonry speed, reduce the use of refractory mud, ensure the strength and stability of masonry, and thus extend the life of lining.

6. Can be processed into special shapes. To reduce the number of bricks and masonry joints.

Uses of mullite lightweight insulation bricks

Mullite lightweight bricks are divided into JM23, JM26, JM28, and JM30 according to the brand. According to the different use temperatures, they are mainly divided into: 1350 lightweight mullite bricks, 1450 mullite insulation bricks, 1550 mullite lightweight bricks, etc. Mullite lightweight insulation bricks can be used as hot surface refractory linings or backing insulation layers of other refractory materials, and are used in ethylene cracking furnaces and tubular heating furnaces in the petroleum and chemical industries. Synthetic ammonia conversion furnaces and coal gas generators. High-temperature shuttle kilns, tunnel kilns, ceramic roller kilns, push-plate kilns and other industrial furnaces refractory furnace insulation materials, etc.